BlackScreen on startup, video card has no output.

Hey people,

I've installed an original genuine version of windows7 on a formatted disk.
It worked fine for a few hours, but when I shutted down my PC, and tried
to turn it on an hour later, it didn't work.

When I turn on my PC, the screen stays as black as it is when my PC is turned off.
I can't even get into BIOS, obviously, because my screen doesn't show ANYTHING.

I Searched the internet for solutions, but I see alot of people who have problems
with a black screen after they saw the Windows7 Logo, but I don't even get to see that anymore..

Can someone provide me with an answer? =)

P.S.: I also changed my videocard because I thought I accidently broke it, but it works in another PC.


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